Control device for vehicular lamp and vehicle lighting system
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United States of America Patent
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May 28, 2019
Grant Date -
Jan 10, 2019
app pub date -
Jul 9, 2018
filing date -
Jul 10, 2017
priority date (Note) -
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status (Latency Note)
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Abstract
To provide a technique capable of accurately obtaining the attitude of a vehicle in the pitch direction. A device controls the optical axis of a vehicular lamp in accordance with an attitude change in pitch direction of the vehicle having (a) an angle calculation part which obtains acceleration associated with the vertical and the horizontal direction at a predetermined time interval, obtains a first and a second acceleration related to the vertical and the horizontal direction by eliminating the gravitational acceleration component from each acceleration, calculates a vehicle traveling direction acceleration based on the two accelerations, and obtains a vehicle attitude angle based on a correlation between the acceleration and the vehicle traveling direction acceleration, and (b) an optical axis setting part which generates a control signal for controlling the optical axis of the lamp based on the vehicle attitude angle, and provides the control signal to the lamp.
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